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| author | Tobias Bucher <tobiasbucher5991@gmail.com> | 2019-05-01 22:23:07 +0200 |
|---|---|---|
| committer | Tobias Bucher <tobiasbucher5991@gmail.com> | 2019-05-01 22:23:07 +0200 |
| commit | bd8885d340beb20ac1728d0bd7e64321da641b91 (patch) | |
| tree | b92c0bc82c916ab33432619c60ef0677c3b4d6a9 /src/libstd | |
| parent | 6cc24f26036b28fb3366de86efe3da6c4464057a (diff) | |
| download | rust-bd8885d340beb20ac1728d0bd7e64321da641b91.tar.gz rust-bd8885d340beb20ac1728d0bd7e64321da641b91.zip | |
Fall back to `/dev/urandom` on `EPERM` for `getrandom`
This can happen because of seccomp or some VMs. Fixes #52609.
Diffstat (limited to 'src/libstd')
| -rw-r--r-- | src/libstd/sys/unix/rand.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/libstd/sys/unix/rand.rs b/src/libstd/sys/unix/rand.rs index 77f1439e17b..71c62461ee9 100644 --- a/src/libstd/sys/unix/rand.rs +++ b/src/libstd/sys/unix/rand.rs @@ -47,7 +47,12 @@ mod imp { let err = errno() as libc::c_int; if err == libc::EINTR { continue; - } else if err == libc::ENOSYS { + } else if err == libc::ENOSYS || err == libc::EPERM { + // Fall back to reading /dev/urandom if `getrandom` is not + // supported on the current kernel. + // + // Also fall back in case it is disabled by something like + // seccomp or inside of virtual machines. GETRANDOM_UNAVAILABLE.store(true, Ordering::Relaxed); return false; } else if err == libc::EAGAIN { |